I'm sure this has been answered before and i saw a post confirming it but being that i will be purchasing these tomorrow i need to know for a fact that these will fit my 04 Maxima without any issue. Also, im assuming the wider rim should be installed in the rear. Thanks.

Price the rubber first, then you know for sure because you will have to spend that every time you get tires and you get more options in tires. IMO, it is just easier to go with 20in. Or be cheap like me and stay on 18s